If the cracks are in the surface layer of the fiberglass, the problem can be rectified. These "spider" cracks form in the gel coating of the fiberglass, due to pressures that can occur from a pool that was not installed quite level, for instance. These types of cracks aren't structural. If the bubbles are raised, I would call a pool repair service.
Fiberglass pools are more durable than concrete pools. Concrete pools tend to require monthly cleaning to prevent algae from growing on the walls. Fiberglass pools tend to need maintenance roughly every 10 years.
To prevent injecting an air bubble into your blood, which can kill you.
get M.O.B. its the best. it has little tiny holes that prevent air bubbles
To prevent the solution from mixing with the residues
You cant prevent it but you can have your foundation purged or vented. Hire a professional to install the equipment.
After you install your water pump, fill with radiator fluid. Then start your engine with the radiator cap off. run your engine until it warms up. You will see bubbles forming in your radiator. When the level rises and stops bubbling out, install the cap back on. Dont fill your radiator if your car is on a downhill, you will prevent air from purging out.
Install air curtain
one of the ways you can implement, is to install a firewall in your network to prevent unauthenticated users from accessing your network.
Fiberglass resin can be used for arts and crafts, but it should be used with caution. Wear protective clothing, gloves and glasses. A facial mask is also a necessary item to prevent breathing in the fibers. This resin is good for making molds.
you can use a fuse or circuit breaker